<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>DIV_layout</title>
    <style type="text/css">
        body {
            margin: 0px;
        }

        #container {
            width: 100%;
            height: 950px;
            background-color: darkgray ;
            
        }

        #heading {
            width: 100%;
            height: 10%;
            background-color: aqua;
        }

        #content_menu {
            width: 30%;
            height: 80%;
            background-color: aquamarine;
            float: left;
        }

        #content_body {
            width: 70%;
            height: 80%;
            background-color: blueviolet;
            float: left;
        }

        #footer{
            width: 100%;
            height: 10%;
            background-color: black;
            clear: #fff;
        }
    </style>
</head>
<body>
    <div id="container">
        <div id="heading">Header</div>
        <div id="content_menu">Content_menu</div>
        <div id="content_body">Content_body</div>
        <div id="footer">footer</div>
    </div>
</body>
</html>
